4. Install Linux Graphics Drivers

AMD users will experience a drop in performance because the AMD driver is not supported as of now (June 2016) in Ubuntu 16.04. So think twice before upgrading if you are playing games or performing GPU-intensive work.

1) Open Software & Updates from the Unity Dash

2) Click on the Additional Drivers tab

3) Follow on-screen instructions

5. Install a System Cleaner

BleachBit is an excellent open-source tool to keep your caches clean and perform some other essential housekeeping from time to time.